Linux: allow linking directly with Kerberos instead of using dlopen.

net/net.gyp

 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'chromium_code': 1,
 
-    'use_kerberos%': 1,
+    'linux_link_kerberos%': 0,
+    'conditions': [
+      ['chromeos==1', {
+        # Disable Kerberos on ChromeOS, at least for now.
+        # It needs configuration (krb5.conf and so on).
+        'use_kerberos%': 0,
+      }, {  # chromeos == 0
+        'use_kerberos%': 1,
+      }],
+    ],
   },
   'targets': [
     {
       'target_name': 'net',
       'type': '<(component)',
       'dependencies': [
         '../base/base.gyp:base',
         '../base/base.gyp:base_i18n',
         '../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
         '../build/temp_gyp/googleurl.gyp:googleurl',
@@ skipping 683 matching lines @@
         ['chromeos==1', {
           'sources!': [
              'proxy/proxy_config_service_linux.cc',
              'proxy/proxy_config_service_linux.h',
           ],
         }],
         ['use_kerberos==1', {
           'defines': [
             'USE_KERBEROS',
           ],
+          'conditions': [
+            ['linux_link_kerberos==1', {
+              'link_settings': {
+                'ldflags': [
+                  '<!@(krb5-config --libs gssapi)',
+                ],
+              },
+            }, { # linux_link_kerberos==0
+              'defines': [
+                'DLOPEN_KERBEROS',
+              ],
+            }],
+          ],
         }, { # use_kerberos == 0
           'sources!': [
             'http/http_auth_gssapi_posix.cc',
             'http/http_auth_gssapi_posix.h',
             'http/http_auth_handler_negotiate.h',
             'http/http_auth_handler_negotiate.cc',
           ],
         }],
         ['use_openssl==1', {
             'sources!': [
@@ skipping 797 matching lines @@
             'tools/dump_cache/url_to_filename_encoder.cc',
             'tools/dump_cache/url_to_filename_encoder.h',
             'tools/dump_cache/url_utilities.h',
             'tools/dump_cache/url_utilities.cc',
           ],
         },
       ],
     }],
   ],
 }